Concrete Sink Repair

[Superman]

I've got one of those HUGE, deep, wide, two-section concrete sinks in my garage that I moved up from the basement. Apparently, the nitwits who actually moved this Goliath managed to get a crack or two in it. It leaks. I can see the cracks. They are not gaping cracks, but rather are hairline things that leak. The thickness of these sink walls is prolly between 3/4" and 1".

I was thinking of using silicon caulk to try to seal these cracks, but a friend said she had some goop for this purpose. She offered me two small cans of powdery stuff......cementacious stuff, that appears to be for this purpose. Anybody have any experience mixing up this cement stuff and using it to patch cracks in concrete so they don't leak?

I figure it might be worth a try. Heck.......if the sink still leaks, I could always just coat the darned thing with epoxy.

[daepp]

How about epoxy? Seal it AND make it stronger?

[stomachmonkey]

Hydraulic Cement.

I've used it to patch pinholes and hairlines in basement walls/floors where the pressure is far greater than what you'd see in a sink.

Stuff is pretty cool.

Mix it and it sets up in a few minutes.

You can mix it thin to let it run into the crack and it sets rock hard.

Get at Home Depot or Lowes in small container.

Amazon.com: Dap 14086 Box Quick Plug Hydraulic Cement 5-Pound: Home Improvement

[trekkor]

Open the cracks up slightly with a Dremel tool. Dry out the water and use JB Weld.
Sand it when it cures.

I'd give that a shot.


KT

[vash]

never seen a sink like this..got a picture?

[Rot 911]

Originally Posted by stomachmonkey

Hydraulic Cement.
I've used it to patch pinholes and hairlines in basement walls/floors where the pressure is far greater than what you'd see in a sink.

This. Used it to seal hairline cracks in our fishpond. You can get it at Lowes, Menards, Home Depot, etc.

[stomachmonkey]

Originally Posted by trekkor

...use JB Weld.

Hydraulic Cement is the "stone" version of JB Weld.

[peppy]

I am curious as to what will work. I have one that I just had re-plumed and I hope it does not leak.

[Superman]

Originally Posted by vash

never seen a sink like this..got a picture?

Mine looks like this, only not quite as ugly. It was in a laundry room in the basement, and will be a GREAT sink for the garage.

[Superman]

Originally Posted by stomachmonkey

Hydraulic Cement.

I've used it to patch pinholes and hairlines in basement walls/floors where the pressure is far greater than what you'd see in a sink.

Stuff is pretty cool.

Mix it and it sets up in a few minutes.

You can mix it thin to let it run into the crack and it sets rock hard.

Get at Home Depot or Lowes in small container.

Amazon.com: Dap 14086 Box Quick Plug Hydraulic Cement 5-Pound: Home Improvement

I think this is prolly the stuff I have. Contains silica and, basically, lime-cement. Says it fixes leaks. I was just skeptical. I'll try it. It says to wet the area, mix and apply.

[stomachmonkey]

Originally Posted by Superman

It says to wet the area, mix and apply.

Mix a small amount and fiddle with it so you get some idea how it sets up.

The stuff I use/d is watery at first, there is a point where it's pliable like clay/putty but quickly starts to set up.

If you mix too much you'll end up wasting a part of the batch since you can't use it faster than it becomes unworkable.

Once it starts to set you can even use it underwater.

[azasadny]

You'll be able to fix that. Those old sinks are great, just heavy as a piano!

[Tishabet]

You sure it's not soapstone? Never heard of a concrete sink...

[drcoastline]

Hydraulic cement for sure we have used it to reapir cracks concrete swiming pools. An easier fix for a hairline crack maybe a good epoxy. Such as West sytem or system 3.